/*

  Copyright (C) 2003-2009, 2013-2014, 2016-2017 Rocky Bernstein

  <rocky@gnu.org>

  Copyright (C) 2000 Herbert Valerio Riedel <hvr@gnu.org>

  This program is free software: you can redistribute it and/or modify

  it under the terms of the GNU General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  This program is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License

  along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

/*! String inside frame which identifies an ISO 9660 filesystem. This

    string is the "id" field of an iso9660_pvd_t or an iso9660_svd_t.

    Note should come *before* #include <cdio/iso9660.h> which does

    a #define of this name.

*/

const char ISO_STANDARD_ID[] = {'C', 'D', '0', '0', '1'};

/* Private headers */

#include "iso9660_private.h"

#include "cdio_assert.h"

/* Public headers */

#include <cdio/bytesex.h>

#include <cdio/iso9660.h>

#include <cdio/util.h>

#include <time.h>

#include <ctype.h>

#ifdef HAVE_STRING_H

# include <string.h>

#endif

#ifdef HAVE_STDIO_H

# include <stdio.h>

#endif

#ifdef HAVE_LIMITS_H

# include <limits.h>

#endif

#ifdef HAVE_STDLIB_H

# include <stdlib.h>

#endif

#ifdef HAVE_SYS_STAT_H

# include <sys/stat.h>

#endif

#ifdef HAVE_ERRNO_H

#include <errno.h>

#endif

#ifndef HAVE_SETENV

static int

setenv(const char *envname, const char *envval, int overwrite)

{

  return -1;

}

#endif

#ifndef HAVE_UNSETENV

static int

unsetenv(const char *envname)

{

  return -1;

}

#endif

#ifndef HAVE_TIMEGM

static time_t

timegm(struct tm *tm)

{

  time_t ret;

  char *tz;

  tz = getenv("TZ");

  setenv("TZ", "UTC", 1);

  tzset();

  ret = mktime(tm);

  if (tz)

    setenv("TZ", tz, 1);

  else

    unsetenv("TZ");

  tzset();

  return ret;

}

#endif

#ifndef HAVE_GMTIME_R

static struct tm *

gmtime_r(const time_t *timer, struct tm *result)

{

    struct tm *tmp = gmtime(timer);

    if (tmp) {

        *result = *tmp;

        return result;

    }

    return tmp;

}

#endif

#ifndef HAVE_LOCALTIME_R

static struct tm *

localtime_r(const time_t *timer, struct tm *result)

{

    struct tm *tmp = localtime(timer);

    if (tmp) {

        *result = *tmp;

        return result;

    }

    return tmp;

}

#endif

/* Variables to hold debugger-helping enumerations */

enum iso_enum1_s     iso_enums1;

enum iso_flag_enum_s iso_flag_enums;

enum iso_vd_enum_s   iso_vd_enums;

enum iso_extension_enum_s iso_extension_enums;

/* some parameters... */

#define SYSTEM_ID         "CD-RTOS CD-BRIDGE"

#define VOLUME_SET_ID     ""

/*!

   Change trailing blanks in str to nulls.  Str has a maximum size of

   n characters.

*/

static char *

strip_trail (const char str[], size_t n)

{

  static char buf[1025];

  int j;

  cdio_assert (n < 1024);

  strncpy (buf, str, n);

  buf[n] = '\0';

  for (j = strlen (buf) - 1; j >= 0; j--)

    {

      if (buf[j] != ' ')

        break;

      buf[j] = '\0';

    }

  return buf;

}

static void

pathtable_get_size_and_entries(const void *pt, unsigned int *size,

                               unsigned int *entries);

/*!

  Get time structure from structure in an ISO 9660 directory index

  record. Even though tm_wday and tm_yday fields are not explicitly in

  idr_date, the are calculated from the other fields.

  If tm is to reflect the localtime set b_localtime true, otherwise

  tm will reported in GMT.

*/

bool

iso9660_get_dtime (const iso9660_dtime_t *idr_date, bool b_localtime,

                   /*out*/ struct tm *p_tm)

{

  if (!idr_date) return false;

  /*

     Section 9.1.5 of ECMA 119 says:

     If all seven numbers are zero, it shall mean that the date and

     time are not specified.

     HACK: However we've seen it happen that everything except gmtoff

     is zero and the expected date is the beginning of the epoch. So

     we accept 6 numbers being zero. I'm also not sure if using the

     beginning of the Epoch is also the right thing to do either.

  */

  if ( 0 == idr_date->dt_year   && 0 == idr_date->dt_month &&

       0 == idr_date->dt_day    && 0 == idr_date->dt_hour  &&

       0 == idr_date->dt_minute && 0 == idr_date->dt_second ) {

    time_t t = 0;

    struct tm temp_tm;

    localtime_r(&t, &temp_tm);

    memcpy(p_tm, &temp_tm, sizeof(struct tm));

    return true;

  }

  memset(p_tm, 0, sizeof(struct tm));

  p_tm->tm_year   = idr_date->dt_year;

  p_tm->tm_mon    = idr_date->dt_month - 1;

  p_tm->tm_mday   = idr_date->dt_day;

  p_tm->tm_hour   = idr_date->dt_hour;

  p_tm->tm_min    = idr_date->dt_minute;

  p_tm->tm_sec    = idr_date->dt_second - idr_date->dt_gmtoff * (15 * 60);

  p_tm->tm_isdst  = -1; /* information not available */

#ifdef HAVE_STRUCT_TM_TM_ZONE

  /* Initialize everything */

  p_tm->tm_zone   = 0;

#endif

  /* Recompute tm_wday and tm_yday via mktime. mktime will also renormalize

     date values to account for the timezone offset. */

  {

    time_t t = 0;

    struct tm temp_tm;

    t = timegm(p_tm);

    if (b_localtime)

      localtime_r(&t, &temp_tm);

    else

      gmtime_r(&t, &temp_tm);

    memcpy(p_tm, &temp_tm, sizeof(struct tm));

  }

  return true;

}

/*

   A note regarding the strange strtol() testing below as pointed out SMS.

   From man strtol:

     If an underflow occurs, strtol() returns LONG_MIN. If an overflow

     occurs, strtol() returns LONG_MAX.  In both cases, errno is set to

     ERANGE.

   This implies that one should only look at errno if the value is

   LONG_MIN or LONG_MAX.

*/

#define set_ltime_field(TM_FIELD, LT_FIELD, ADD_CONSTANT)               \

  {                                                                     \

    char num[10]; long tmp;                                             \

    memcpy(num, p_ldate->LT_FIELD, sizeof(p_ldate->LT_FIELD));          \

    num[sizeof(p_ldate->LT_FIELD)] = '\0';                              \

    errno = 0;                                                          \

    tmp = strtol(num,                                                   \

                 (char **)NULL, 10);                                    \

    if ( tmp < INT_MIN || tmp > INT_MAX ||                              \

         ((unsigned long)tmp + ADD_CONSTANT) > INT_MAX ||               \

         (tmp + ADD_CONSTANT) < INT_MIN )                               \

      return false;                                                     \

    p_tm->TM_FIELD = tmp + ADD_CONSTANT;                                \

  }

/*!

  Get "long" time in format used in ISO 9660 primary volume descriptor

  from a Unix time structure.

*/

bool

iso9660_get_ltime (const iso9660_ltime_t *p_ldate,

                   /*out*/ struct tm *p_tm)

{

  if (!p_tm) return false;

  memset(p_tm, 0, sizeof(struct tm));

  set_ltime_field(tm_year, lt_year,  -1900);

  set_ltime_field(tm_mon,  lt_month, -1);

  set_ltime_field(tm_mday, lt_day,    0);

  set_ltime_field(tm_hour, lt_hour,   0);

  set_ltime_field(tm_min,  lt_minute, 0);

  set_ltime_field(tm_sec,  lt_second, 0);

  p_tm->tm_isdst= -1; /* information not available */

#ifndef HAVE_TM_GMTOFF

  p_tm->tm_sec += p_ldate->lt_gmtoff * (15 * 60);

#endif

#ifdef HAVE_STRUCT_TM_TM_ZONE

  /* Initialize everything */

  p_tm->tm_zone = 0;

#endif

  /* Recompute tm_wday and tm_yday via mktime. mktime will also renormalize

     date values to account for the timezone offset. */

  {

    time_t t;

    struct tm temp_tm;

    t = mktime(p_tm);

    localtime_r(&t, &temp_tm);

    memcpy(p_tm, &temp_tm, sizeof(struct tm));

  }

  p_tm->tm_isdst= -1; /* information not available */

#ifdef HAVE_TM_GMTOFF

  p_tm->tm_gmtoff = -p_ldate->lt_gmtoff * (15 * 60);

#endif

  return true;

}

/*!

  Set time in format used in ISO 9660 directory index record

  from a Unix time structure. timezone is given as an offset

  correction in minutes.

*/

void

iso9660_set_dtime_with_timezone (const struct tm *p_tm,

                                 int time_zone,

                                 /*out*/ iso9660_dtime_t *p_idr_date)

{

  memset (p_idr_date, 0, 7);

  if (!p_tm) return;

  p_idr_date->dt_year   = p_tm->tm_year;

  p_idr_date->dt_month  = p_tm->tm_mon + 1;

  p_idr_date->dt_day    = p_tm->tm_mday;

  p_idr_date->dt_hour   = p_tm->tm_hour;

  p_idr_date->dt_minute = p_tm->tm_min;

  p_idr_date->dt_second = p_tm->tm_sec;

  /* The ISO 9660 timezone is in the range -48..+52 and each unit

     represents a 15-minute interval. */

  p_idr_date->dt_gmtoff = time_zone / 15;

  if (p_idr_date->dt_gmtoff < -48 ) {

    cdio_warn ("Converted ISO 9660 timezone %d is less than -48. Adjusted",

               p_idr_date->dt_gmtoff);

    p_idr_date->dt_gmtoff = -48;

  } else if (p_idr_date->dt_gmtoff > 52) {

    cdio_warn ("Converted ISO 9660 timezone %d is over 52. Adjusted",

               p_idr_date->dt_gmtoff);

    p_idr_date->dt_gmtoff = 52;

  }

}

/*!

  Set time in format used in ISO 9660 directory index record

  from a Unix time structure. */

void

iso9660_set_dtime(const struct tm *p_tm, /*out*/ iso9660_dtime_t *p_idr_date)

{

  int time_zone = 0;

  if (p_tm) {

#ifdef HAVE_TM_GMTOFF

    /* Convert seconds to minutes */

    time_zone = p_tm->tm_gmtoff / 60;

#else

    time_zone = (p_tm->tm_isdst > 0) ? -60 : 0;

#endif

  }

  iso9660_set_dtime_with_timezone (p_tm, time_zone, p_idr_date);

}

/*!

  Set "long" time in format used in ISO 9660 primary volume descriptor

  from a Unix time structure. timezone is given as an offset

  correction in minutes.

*/

void

iso9660_set_ltime_with_timezone(const struct tm *p_tm,

                                int time_zone,

                                /*out*/ iso9660_ltime_t *pvd_date)

{

  char *_pvd_date = (char *) pvd_date;

  memset (_pvd_date, (int) '0', 16);

  pvd_date->lt_gmtoff = (iso712_t) 0; /* Start out with time zone GMT. */

  if (!p_tm) return;

  snprintf(_pvd_date, 17,

           "%4.4d%2.2d%2.2d" "%2.2d%2.2d%2.2d" "%2.2d",

           p_tm->tm_year + 1900, p_tm->tm_mon + 1, p_tm->tm_mday,

           p_tm->tm_hour, p_tm->tm_min, p_tm->tm_sec,

           0 /* 1/100 secs */ );

  /* Set time zone in 15-minute interval encoding. */

  pvd_date->lt_gmtoff -= (time_zone / 15);

  if (pvd_date->lt_gmtoff < -48 ) {

    cdio_warn ("Converted ISO 9660 timezone %d is less than -48. Adjusted",

               (int) pvd_date->lt_gmtoff);

    pvd_date->lt_gmtoff = -48;

  } else if (pvd_date->lt_gmtoff > 52) {

    cdio_warn ("Converted ISO 9660 timezone %d is over 52. Adjusted",

               (int) pvd_date->lt_gmtoff);

    pvd_date->lt_gmtoff = 52;

  }

}

/*!

  Set "long" time in format used in ISO 9660 primary volume descriptor

  from a Unix time structure. */

void

iso9660_set_ltime(const struct tm *p_tm, /*out*/ iso9660_ltime_t *pvd_date)

{

  int time_zone = 0;

  if (p_tm) {

#ifdef HAVE_TM_GMTOFF

    /* Set time zone in 15-minute interval encoding. */

    time_zone = p_tm->tm_gmtoff / 60;

#else

    time_zone = (p_tm->tm_isdst > 0) ? -60 : 0;

#endif

  }

  iso9660_set_ltime_with_timezone (p_tm, time_zone, pvd_date);

}

/*!

   Convert an ISO-9660 file name which is in the format usually stored

   in a ISO 9660 directory entry into what's usually listed as the

   file name in a listing.  Lowercase name, and remove trailing ;1's

   or .;1's and turn the other ;'s into version numbers.

   @param psz_oldname the ISO-9660 filename to be translated.

   @param psz_newname returned string. The caller allocates this and

   it should be at least the size of psz_oldname.

   @return length of the translated string is returned. It will be no greater

   than the length of psz_oldname.

*/

int

iso9660_name_translate(const char *psz_oldname, char *psz_newname)

{

  return iso9660_name_translate_ext(psz_oldname, psz_newname, 0);

}

/*!

   Convert an ISO-9660 file name which is in the format usually stored

   in a ISO 9660 directory entry into what's usually listed as the

   file name in a listing.  Lowercase name if no Joliet Extension

   interpretation. Remove trailing ;1's or .;1's and turn the other

   ;'s into version numbers.

   @param psz_oldname the ISO-9660 filename to be translated.

   @param psz_newname returned string. The caller allocates this and

   it should be at least the size of psz_oldname.

   @param u_joliet_level 0 if not using Joliet Extension. Otherwise the

   Joliet level.

   @return length of the translated string is returned. It will be no greater

   than the length of psz_oldname.

*/

int

iso9660_name_translate_ext(const char *psz_oldname, char *psz_newname,

                           uint8_t u_joliet_level)

{

  int len = strlen(psz_oldname);

  int i;

  if (0 == len) return 0;

  for (i = 0; i < len; i++) {

    unsigned char c = psz_oldname[i];

    if (!c)

      break;

    /* Lower case, unless we have Joliet extensions.  */

    if (!u_joliet_level && isupper(c)) c = tolower(c);

    /* Drop trailing '.;1' (ISO 9660:1988 7.5.1 requires period) */

    if (c == '.' && i == len - 3

        && psz_oldname[i + 1] == ';' && psz_oldname[i + 2] == '1')

      break;

    /* Drop trailing ';1' */

    if (c == ';' && i == len - 2 && psz_oldname[i + 1] == '1')

      break;

    /* Convert remaining ';' to '.' */

    if (c == ';')

      c = '.';

    psz_newname[i] = c;

  }

  psz_newname[i] = '\0';

  return i;

}

/*!

  Pad string src with spaces to size len and copy this to dst. If

  len is less than the length of src, dst will be truncated to the

  first len characters of src.

  src can also be scanned to see if it contains only ACHARs, DCHARs,

  7-bit ASCII chars depending on the enumeration _check.

  In addition to getting changed, dst is the return value.

  Note: this string might not be NULL terminated.

 */

char *

iso9660_strncpy_pad(char dst[], const char src[], size_t len,

                    enum strncpy_pad_check _check)

{

  size_t rlen;

  cdio_assert (dst != NULL);

  cdio_assert (src != NULL);

  cdio_assert (len > 0);

  switch (_check)

    {

      int idx;

    case ISO9660_NOCHECK:

      break;

    case ISO9660_7BIT:

      for (idx = 0; src[idx]; idx++)

        if ((int8_t) src[idx] < 0)

          {

            cdio_warn ("string '%s' fails 7bit constraint (pos = %d)",

                      src, idx);

            break;

          }

      break;

    case ISO9660_ACHARS:

      for (idx = 0; src[idx]; idx++)

        if (!iso9660_is_achar (src[idx]))

          {

            cdio_warn ("string '%s' fails a-character constraint (pos = %d)",

                      src, idx);

            break;

          }

      break;

    case ISO9660_DCHARS:

      for (idx = 0; src[idx]; idx++)

        if (!iso9660_is_dchar (src[idx]))

          {

            cdio_warn ("string '%s' fails d-character constraint (pos = %d)",

                      src, idx);

            break;

          }

      break;

    default:

      cdio_assert_not_reached ();

      break;

    }

  rlen = strlen (src);

  if (rlen > len)

    cdio_warn ("string '%s' is getting truncated to %d characters",

              src, (unsigned int) len);

  strncpy (dst, src, len);

  if (rlen < len)

    memset(dst+rlen, ' ', len-rlen);

  return dst;

}

/*!

   Return true if c is a DCHAR - a valid ISO-9660 level 1 character.

   These are the ASCSII capital letters A-Z, the digits 0-9 and an

   underscore.

*/

bool

iso9660_is_dchar (int c)

{

  if (!IN (c, 0x30, 0x5f)

      || IN (c, 0x3a, 0x40)

      || IN (c, 0x5b, 0x5e))

    return false;

  return true;

}

/*!

   Return true if c is an ACHAR -

   These are the DCHAR's plus some ASCII symbols including the space

   symbol.

*/

bool

iso9660_is_achar (int c)

{

  if (!IN (c, 0x20, 0x5f)

      || IN (c, 0x23, 0x24)

      || c == 0x40

      || IN (c, 0x5b, 0x5e))

    return false;

  return true;

}

void

iso9660_set_evd(void *pd)

{

  iso_volume_descriptor_t ied;

  cdio_assert (sizeof(iso_volume_descriptor_t) == ISO_BLOCKSIZE);

  cdio_assert (pd != NULL);

  memset(&ied, 0, sizeof(ied));

  ied.type = to_711(ISO_VD_END);

  iso9660_strncpy_pad (ied.id, ISO_STANDARD_ID, sizeof(ied.id),

                       ISO9660_DCHARS);

  ied.version = to_711(ISO_VERSION);

  memcpy(pd, &ied, sizeof(ied));

}

void

iso9660_set_pvd(void *pd,

                const char volume_id[],

                const char publisher_id[],

                const char preparer_id[],

                const char application_id[],

                uint32_t iso_size,

                const void *root_dir,

                uint32_t path_table_l_extent,

                uint32_t path_table_m_extent,

                uint32_t path_table_size,

                const time_t *pvd_time

                )

{

  iso9660_pvd_t ipd;

  struct tm temp_tm;

  cdio_assert (sizeof(iso9660_pvd_t) == ISO_BLOCKSIZE);

  cdio_assert (pd != NULL);

  cdio_assert (volume_id != NULL);

  cdio_assert (application_id != NULL);

  memset(&ipd,0,sizeof(ipd)); /* paranoia? */

  /* magic stuff ... thatis CD XA marker... */

  strncpy(((char*)&ipd)+ISO_XA_MARKER_OFFSET, ISO_XA_MARKER_STRING,

          sizeof(ISO_XA_MARKER_STRING));

  ipd.type = to_711(ISO_VD_PRIMARY);

  iso9660_strncpy_pad (ipd.id, ISO_STANDARD_ID, 5, ISO9660_DCHARS);

  ipd.version = to_711(ISO_VERSION);

  iso9660_strncpy_pad (ipd.system_id, SYSTEM_ID, 32, ISO9660_ACHARS);

  iso9660_strncpy_pad (ipd.volume_id, volume_id, 32, ISO9660_DCHARS);

  ipd.volume_space_size = to_733(iso_size);

  ipd.volume_set_size = to_723(1);

  ipd.volume_sequence_number = to_723(1);

  ipd.logical_block_size = to_723(ISO_BLOCKSIZE);

  ipd.path_table_size = to_733(path_table_size);

  ipd.type_l_path_table = to_731(path_table_l_extent);

  ipd.type_m_path_table = to_732(path_table_m_extent);

  /* root_directory_record doesn't contain the 1-byte filename,

     so we add one for that. */

  cdio_assert (sizeof(ipd.root_directory_record) == 33);

  memcpy(&(ipd.root_directory_record), root_dir,

         sizeof(ipd.root_directory_record));

  ipd.root_directory_filename='\0';

  ipd.root_directory_record.length = sizeof(ipd.root_directory_record)+1;

  iso9660_strncpy_pad (ipd.volume_set_id, VOLUME_SET_ID,

                       ISO_MAX_VOLUMESET_ID, ISO9660_DCHARS);

  iso9660_strncpy_pad (ipd.publisher_id, publisher_id, ISO_MAX_PUBLISHER_ID,

                       ISO9660_ACHARS);

  iso9660_strncpy_pad (ipd.preparer_id, preparer_id, ISO_MAX_PREPARER_ID,

                       ISO9660_ACHARS);

  iso9660_strncpy_pad (ipd.application_id, application_id,

                       ISO_MAX_APPLICATION_ID, ISO9660_ACHARS);

  iso9660_strncpy_pad (ipd.copyright_file_id    , "", 37, ISO9660_DCHARS);

  iso9660_strncpy_pad (ipd.abstract_file_id     , "", 37, ISO9660_DCHARS);

  iso9660_strncpy_pad (ipd.bibliographic_file_id, "", 37, ISO9660_DCHARS);

  gmtime_r(pvd_time, &temp_tm);

  iso9660_set_ltime (&temp_tm, &(ipd.creation_date));

  gmtime_r(pvd_time, &temp_tm);

  iso9660_set_ltime (&temp_tm, &(ipd.modification_date));

  iso9660_set_ltime (NULL,     &(ipd.expiration_date));

  iso9660_set_ltime (NULL,     &(ipd.effective_date));

  ipd.file_structure_version = to_711(1);

  /* we leave ipd.application_data = 0 */

  memcpy(pd, &ipd, sizeof(ipd)); /* copy stuff to arg ptr */

}

unsigned int

iso9660_dir_calc_record_size(unsigned int namelen, unsigned int su_len)

{

  unsigned int length;

  length = sizeof(iso9660_dir_t);

  length += namelen;

  if (length % 2) /* pad to word boundary */

    length++;

  length += su_len;

  if (length % 2) /* pad to word boundary again */

    length++;

  return length;

}

void

iso9660_dir_add_entry_su(void *dir,

                         const char filename[],

                         uint32_t extent,

                         uint32_t size,

                         uint8_t file_flags,

                         const void *su_data,

                         unsigned int su_size,

                         const time_t *entry_time)

{

  iso9660_dir_t *idr = dir;

  uint8_t *dir8 = dir;

  unsigned int offset = 0;

  uint32_t dsize = from_733(idr->size);

  int length, su_offset;

  struct tm temp_tm;

  cdio_assert (sizeof(iso9660_dir_t) == 33);

  if (!dsize && !idr->length)

    dsize = ISO_BLOCKSIZE; /* for when dir lacks '.' entry */

  cdio_assert (dsize > 0 && !(dsize % ISO_BLOCKSIZE));

  cdio_assert (dir != NULL);

  cdio_assert (extent > 17);

  cdio_assert (filename != NULL);

  cdio_assert (strlen(filename) <= MAX_ISOPATHNAME);

  length = sizeof(iso9660_dir_t);

  length += strlen(filename);

  length = _cdio_ceil2block (length, 2); /* pad to word boundary */

  su_offset = length;

  length += su_size;

  length = _cdio_ceil2block (length, 2); /* pad to word boundary again */

  /* find the last entry's end */

  {

    unsigned int ofs_last_rec = 0;

    offset = 0;

    while (offset < dsize)

      {

        if (!dir8[offset])

          {

            offset++;

            continue;

          }

        offset += dir8[offset];

        ofs_last_rec = offset;

      }

    cdio_assert (offset == dsize);

    offset = ofs_last_rec;

  }

  /* be sure we don't cross sectors boundaries */

  offset = _cdio_ofs_add (offset, length, ISO_BLOCKSIZE);

  offset -= length;

  cdio_assert (offset + length <= dsize);

  idr = (iso9660_dir_t *) &dir8[offset];

  cdio_assert (offset+length < dsize);

  memset(idr, 0, length);

  idr->length = to_711(length);

  idr->extent = to_733(extent);

  idr->size = to_733(size);

  gmtime_r(entry_time, &temp_tm);

  iso9660_set_dtime (&temp_tm, &(idr->recording_time));

  idr->file_flags = to_711(file_flags);

  idr->volume_sequence_number = to_723(1);

  idr->filename.len = to_711(strlen(filename)

                             ? strlen(filename) : 1); /* working hack! */

  memcpy(&idr->filename.str[1], filename, from_711(idr->filename.len));

  if (su_size > 0 && su_data)

    memcpy(&dir8[offset] + su_offset, su_data, su_size);

}

void

iso9660_dir_init_new (void *dir,

                      uint32_t self,

                      uint32_t ssize,

                      uint32_t parent,

                      uint32_t psize,

                      const time_t *dir_time)

{

  iso9660_dir_init_new_su (dir, self, ssize, NULL, 0, parent, psize, NULL,

                           0, dir_time);

}

void

iso9660_dir_init_new_su (void *dir,

                         uint32_t self,

                         uint32_t ssize,

                         const void *ssu_data,

                         unsigned int ssu_size,

                         uint32_t parent,

                         uint32_t psize,

                         const void *psu_data,

                         unsigned int psu_size,

                         const time_t *dir_time)

{

  cdio_assert (ssize > 0 && !(ssize % ISO_BLOCKSIZE));

  cdio_assert (psize > 0 && !(psize % ISO_BLOCKSIZE));

  cdio_assert (dir != NULL);

  memset (dir, 0, ssize);

  /* "\0" -- working hack due to padding  */

  iso9660_dir_add_entry_su (dir, "\0", self, ssize, ISO_DIRECTORY, ssu_data,

                            ssu_size, dir_time);

  iso9660_dir_add_entry_su (dir, "\1", parent, psize, ISO_DIRECTORY, psu_data,

                            psu_size, dir_time);

}

/* Zero's out pathable. Do this first.  */

void

iso9660_pathtable_init (void *pt)

{

  cdio_assert (sizeof (iso_path_table_t) == 8);

  cdio_assert (pt != NULL);

  memset (pt, 0, ISO_BLOCKSIZE); /* fixme */

}

/*!

  Returns POSIX mode bitstring for a given file.

*/

mode_t

iso9660_get_posix_filemode(const iso9660_stat_t *p_iso_dirent)

{

  mode_t mode = 0;

#ifdef HAVE_ROCK

  if (yep == p_iso_dirent->rr.b3_rock) {

      return iso9660_get_posix_filemode_from_rock(&p_iso_dirent->rr);

  } else

#endif

  if (p_iso_dirent->b_xa) {

    return iso9660_get_posix_filemode_from_xa(p_iso_dirent->xa.attributes);

  }

  return mode;

}

static const iso_path_table_t *

pathtable_get_entry (const void *pt, unsigned int entrynum)

{

  const uint8_t *tmp = pt;

  unsigned int offset = 0;

  unsigned int count = 0;

  cdio_assert (pt != NULL);

  while (from_711 (*tmp))

    {

      if (count == entrynum)

        break;

      cdio_assert (count < entrynum);

      offset += sizeof (iso_path_table_t);

      offset += from_711 (*tmp);

      if (offset % 2)

        offset++;